I'm always happy to help when I can, and easily could here, but I'm not the man for 'FlyCumbria'.
When I act professionally, I'm professionally bound to put personal opinions aside and accept a Brief whether or not I'm sympathetic to the client's cause. I agree with the rule, abide by it, and do my best for the client regardless of my own views.
When asked for advice informally/socially, I have a completely free choice whether to help. I'm an aviator and I'm happy to help aviators, but not Nimbies.
Helo invited me to give my thoughts, so I will:
This man is a Nimby looking for ammunition to use against the proposed helicopter operation. Fine, but he can do so without my help.
The local authority doesn't appear to have a problem with the idea, but he's not happy about that, so out come the conspiracy theories:
"The really sad thing is that because this guy employs quite a few people locally, no-one wants to stand up to him. The parish councillors are just shoulder-shrugging because they think they may get some big quarry lorries "accidentally" knocking their front walls down etc and it's possible money has changed hands. 
The CAA is perfectly capable of assessing the safety aspects. If the proposed operation wouldn't be safe, then the CAA won't allow it. But, he doesn't seem to be content to just leave it to the CAA.
And, if it goes ahead, he sounds like just the type who'll be watching, trying to spot reasons to report pilots to the CAA, complain to the local council etc etc.
As for:
"Get me right, I'm all for aviation, but .......... etc." That's what Nimbies always say. 'I'm all for aviation, but ........ (
Not
In
My
Back
Yard.)
Edit
Oh alright, I'll help a bit .........
FlyCumbria
I suspect what you're really concerned about is noise, not safety. If I'm wrong about your motive, I apologise. (Most nimbies I've encountered claim they're concerned about safety.)
If you're genuinely concerned about "doing things right and safely, neither endangering local residents or the passengers" then I can put your mind at rest.
The CAA is extremely safety conscious - you wouldn't believe how safety conscious. The CAA is probably the most safety conscious aviation authority on the planet. Some would say they're obsessive about it to such an extent they see 'safety issues' where none exist.
My advice to you, no charge, is: Relax, let them get on with it.
Now I wonder why I get the feeling you won't be following that advice. 
FL